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Electrochemical sensor for rapid trace detection on butyl p-hydroxybenzoate and preparation method of electrochemical sensor

A butyl hydroxybenzoate, electrochemical technology, applied in the direction of material electrochemical variables, can solve problems such as complex detection steps, and achieve the effects of simple operation, good reproducibility, and little impact on physical health

Inactive Publication Date: 2016-01-06
XINYANG NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the defects in the prior art that the detection of the preservative butyl p-hydroxybenzoate can only be completed with the help of expensive instruments, and the detection steps are complicated, the present invention provides a method based on hollow CeO 2 Electrochemical sensor for rapid detection of preservative butyl p-hydroxybenzoate in trace amounts of microspheres and its preparation method

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  • Electrochemical sensor for rapid trace detection on butyl p-hydroxybenzoate and preparation method of electrochemical sensor

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preparation example Construction

[0037]The preparation method of the electrochemical sensor of described trace rapid detection preservative butyl p-hydroxybenzoate comprises the following steps:

[0038] Step 1, the synthesis of Ce-Cit coordination polymer hollow microspheres:

[0039] 6mmol of citric acid was added to 24mL of secondary water, 2mmol of Ce(NO 3 ) 3 ·6H 2 O was added in the above-mentioned citric acid solution under stirring condition, after stirring for a few minutes, the solution was transferred to a 30mL reactor, sealed, reacted at 160°C for 12h, adjusted the pH value with 1mol / L HCl, and adjusted the reactant quality when necessary, The product obtained was washed several times with water and ethanol respectively, and dried at 60° C.;

[0040] Step 2. Hollow CeO 2 Synthesis of microspheres: calcining the Ce-Cit coordination polymer hollow microspheres synthesized in step 1 at 365°C for 1.5h to obtain the target object;

[0041] Step 3. Hollow CeO 2 Dispersion pretreatment of microsphe...

Embodiment 1

[0057] An electrochemical sensor for quickly detecting the preservative butyl p-hydroxybenzoate in a trace amount, including a working electrode, a reference electrode, and a counter electrode; it is characterized in that: the working electrode is a hollow CeO with high electroactivity drop-coated on the surface 2 Glassy carbon electrodes with microsphere-modified membranes, such as figure 1 As shown, 1 is glassy carbon substrate 2 surface drop-coated with hollow CeO 2 The modified film of microspheres, 2 is a glassy carbon substrate, 3 is an insulating layer, and 4 is an electrode lead connected to the glassy carbon substrate 2;

[0058] The preparation method of the electrochemical sensor of described trace rapid detection preservative butyl p-hydroxybenzoate comprises the following steps:

[0059] Step 1: Synthesis of Ce-Cit coordination polymer hollow microspheres:

[0060] 6mmol of citric acid was added to 24mL of secondary water, 2mmol of Ce(NO 3 ) 3 ·6H 2 O was ad...

Embodiment 2

[0078] An electrochemical sensor for quickly detecting the preservative butyl p-hydroxybenzoate in a trace amount, including a working electrode, a reference electrode, and a counter electrode; it is characterized in that: the working electrode is a hollow CeO with high electroactivity drop-coated on the surface 2 Glassy carbon electrodes with microsphere-modified membranes, such as figure 1 As shown, 1 is glassy carbon substrate 2 surface drop-coated with hollow CeO 2 The modified film of microspheres, 2 is a glassy carbon substrate, 3 is an insulating layer, and 4 is an electrode lead connected to the glassy carbon substrate 2;

[0079] The preparation method of the electrochemical sensor of described trace rapid detection preservative butyl p-hydroxybenzoate comprises the following steps:

[0080] Step 1: Synthesis of Ce-Cit coordination polymer hollow microspheres:

[0081] 6mmol of citric acid was added to 24mL of secondary water, 2mmol of Ce(NO 3 ) 3 ·6H 2O was add...

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Abstract

The invention relates to the fields of electrochemical sensors and electro-analytical chemistry and particularly discloses an electrochemical sensor for performing rapid trace detection on a preservative, namely butyl p-hydroxybenzoate, and a preparation method of the electrochemical sensor. The electrochemical sensor for performing the rapid trace detection on the preservative, namely butyl p-hydroxybenzoate, is high in measurement sensitivity, good in selectivity, simple to operate and low in cost, and a result is credible. The electrochemical sensor comprises a working electrode, a reference electrode and a counter electrode, wherein the working electrode adopts a glassy carbon electrode dropwise coated with a hollow CeO2 microsphere modified film with high electroactivity. The prepared electrochemical sensor is successfully applied to detection of butyl p-hydroxybenzoate in spiced dried bean curds, a variety of cellulose compound capsules, jam and cosmetics.

Description

technical field [0001] The invention relates to the fields of electrochemical sensors and electroanalytical chemistry, in particular to an electrochemical sensor for rapidly detecting trace amounts of butyl p-hydroxybenzoate in cosmetics, food and medicine and a preparation method thereof. Background technique [0002] Butyl p-hydroxybenzoate, also known as paraben, is a series of preservatives with the widest application, the largest amount, and the highest frequency of application in the world. Based on its high efficiency, non-volatility, wide range of pH applications, and good bactericidal ability , easy compatibility and good chemical stability are widely used in daily chemicals, cosmetics, medicine, food, feed and various industrial anti-corrosion aspects. In recent years, with the development of society and economy, the amount of paraben preservatives has gradually increased, and the amount of residues in the environment has increased day by day. Due to the relativel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/30
Inventor 甘甜孙俊永吕珍史朝霞赵爱霞孙云云
Owner XINYANG NORMAL UNIVERSITY
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